Botanical Sciences 97 (4): 741-753. 2019 Received: February 15, 2019, accepted: July 15, 2019 DOI: 10.17129/botsci.2174 On line first: December 17, 2019 Taxonomy and Floristics/Taxonomía y Florística Why continue with floristic checklists in Mexico? The case of the Tacaná- Boquerón Priority Terrestrial Region, in the Mexican State of Chiapas ¿Por qué continuar realizando listados florísticos en México? El caso de la Región Terrestre Prioritaria Tacaná-Boquerón, Chiapas Rubén Martínez-Camilo1*, Nayely Martínez-Meléndez2, Manuel Martínez-Meléndez3,4, Miguel Ángel Pérez- Farrera3, and Derio Antonio Jiménez-López1 1 Centro del Cambio Global y La Sustentabilidad A.C., Villahermosa, Tabasco, México. 2 El Colegio de la Frontera Sur, San Cristóbal de Las Casas, Chiapas, México. 3 Herbario Eizi Matuda; Laboratorio de Ecología Evolutiva, Instituto de Ciencias Biológicas, Universidad de Ciencias y Artes de Chiapas, Tuxtla Gutiérrez, Chiapas, México. 4 Eizia A.C., Tuxtla Gutiérrez, Chiapas, México. * Corresponding author:
[email protected] Abstract Background: Some regions of Mexico have been relatively well explored floristically and estimates of the vascular plant richness they contain have been obtained. However, there are still regions that require effort to obtain the most appropriate lists of flora possible that consider both systemization of the information and that benefit from recent botanical explorations. Questions: What is the species richness of vascular plants in the Tacaná-Boquerón Priority Terrestrial Region? What proportion of the species are endemic or included in risk categories? Study sites and dates: Tacaná-Boquerón Priority Terrestrial Region, Chiapas State, Mexico. This region is on the Guatemala border and covers an area of 57,400 ha.